Conduit clamp



March 17, 1931. W s, AYER ET AL 1,797,214

CONDUITGLAMP Filed Dec. 18, 1928 f dwf/lfm ATTORNEYS Patented Mar. 11'7, 1931 .l

yiii'rf fWAKLTER s. MAYBE AND WILLIAM TLBBADLEY, or rHiLADnLrHIA, rinviisYIiviiti'AY n CNDUIT CLAMP Appiicanon inea December 18.19728. Vserial N'. szavssf jk kThis invention v:relates to supportingde! vicesV Which be attached lto various; ob# VJeets or structuralelements-'for the purpose ,of securing and supporting conduits, cables,-

5 insulatorsv and'thelike. More specifically the.

inventionis concerned with adevice ofthis type Whichfis'readily attachable to a structural elementr such als lthe flange of an I-beam, and provides Lmeans for receivingv and clamping y aconduit, etc. in rigid relation theretofrrlhe object of the inventionis to provide a yClamping bracket of this type Which is of,r

simple and `inexpensive construction,V readilyk f attachable to `objects ofgdifferentf sizesj andv .',15 capable of clamping conduits, cables, etc.V

which may run in various directions with ref-` erence to the fixed object. yThe novel bracket or clamp consists ofy aY few parts, maybe l ,readily secured in :position and `With minor-y v v changes vcanbelused for a Wide varietyof Y purposes v This bracket includes a base member adapt-l ed to be placed against oney surface of the object, a. clamping member or jaw WithatWo bearing ends, one of Which engages the op.-`

A posite surface of the obj ect and the other one face of the base member, and means such as 5.a bolt for forcing the clamping jaw, tightly against the object and the base meinben Atv tached yto the base member in any convenient manner as 4by means ofthe saine bolt, is a ,clamping ja-W orholder between Which'and the lbase member is held they conduit to be supported'.

' 35 ForY a ybetter understanding of the invenf..

- tion,v referencemaybe had to the accompany-r ing drawing in which the device of the'in-y vention is shown-in numerous forms and used for various` purposes. In this drawing',A

' n 40`V Fig. 1 ,is-a sectional View through a part they long axis ofthe beam;

f Fig 5 isa View similar to Figlshov'ing the'device supporting apair of conduits; 1 Y

Figs'fand 7 yaresideV and` bottomfplan views respectivelyof a structure. similar to Figi l, in. which theconduit is'supported transversely to the long axis of the beam;`

Fig. Sushovvs a transverse sectionalrvievv through va beamvvitliapair ofsupporting clamps used to supporta row of conduits;

Figs. k9 andfl() are-sectional vievvs through and* tWO'CableS, respectively; 'i A the de vice supporting'a conductor mounted on an insulator attached to the (levied-and Fig. 12`is a bottom plan'vievv kof. thedeviee j f y shown in'Fig. 11.'V

.Referring noW tothe draiii/ings, the ,clamp-f ing supportingdevice is shown in F ig. 1 at-' tached tothe flange of avbeani 10. `1Thede vice lconsists vof `a basememberuordisc12.v l preferably in the form of around inetalplate A 60; n a beam showingtlie device-supporting' one4v Figfll isa view similar to Fig. 1showing i ofV suitable diameter having .an opening through its center.` This plate is, adapted to bear against the underv surface of the beam 10. Extending through vthe openingy in. the disc. is a -bo`lt13 having aheadl 14 'at itsup per end.v This bolt passes through an: opens ing in a clamping jaw 15 Which has ashort leg 16 and a long'leg'l'?. n The clamping member is` generally arch. shaped 'in cross-section, y

the openingthroughit lyingat the apex ofy the. arch and being somewhat largerthan the bolt so thatthe membermayhavea slight i freedom of `movement.;relative @to the bolt When the'deviceis being secured in position. rlhe clampingmeinber'takestheform ofaY flat Web-.18.With1 an upstanding flange 19 pro-f jecting from each 'edge and preferably these flanges are' spaced apart so that'the Yhead of the Ybolt may lie between. them and the bolt.

is' then held againstturning by engagement of. the sides of its Vhead With ,the inner faces;

of the fianges. The distance betweenthe'tip f of the short leg'of the clamping member and the center ofthe boltvvhenthe latter is-inplace is less than the radius of the base' member 12 and this is also true lWithrespect to thelong leg 17. In mountingthe `device inn-place the shortleg is. kplaced againsttlie uppersurface of the flange of the beam and l upper surface of the base member while the long leg'17 ofthe clampingV jawbears against the upper surface of the base member `and prevents it from turning around the edge of the liangeto release the device therefrom.

By reason of the fact that the clamp'jaw has legs of different lengths and is somewhat loosely mounted on the bolt, thedevice may be tightlysecured on flanges of ydifferent thicknesses. Then the device is secured to a flange thicker than that illustrated in Fig. 1, .the

clamping jaw is tilted on the bolt sothat the long leg-17 has amore nearly upright position andthe lower end ofthe leg 17 will then bear on the upper surface of the base memberV near thecenter. If the flange is thinner than that shown, the clamping aw will assume another position of adjustment, but since the long leg is shorter than the radius of the platel 12, the end of the long leg will always bear against the upper surface of the base regardless ofthe ,thickness of the flange. This engagement of the long leg with the base plate insures that the upper surface of the plate will lie flat with the under surface of the fiange and accordingly no matter how tightly; the bolt is drawn up, there will be` no tendency for-the plate to tilt around the edge of the tlangeand release the device.

' Means are provided for securingconduits, cables andthe like to the device and for this purpose the bolt 13 may be conveniently used. For aisingle conduit there may be employed a clamping member 21 in the form of a metal strap having a curved portion 22Iproviding a seat for the conduit and an upright portion 22 which is adapted to bear against the under surface of the base plate. A nut 24 threaded on the bolt secures this clamping member in position. VThe member 21 is mounted loosely on the bolt and to secure a conduit to the flange, the device is first attached to the flange, then the member 21 is slipped over the end of the bolt andthe conduit placed in proper position in'its seat. .The nutV 24 is then threaded on the-bolt to force the clamping'me'mber toward the under surface of the basev plate. Thiscauses the upper surface of the conduit 25 in the seat to bear against the. bottom of the base plate and the upright portion 23 is also forced against the plate by reason of the loose t of the member 23 `on the bolt.

11n Figs. 1, 2 and 3, thedevice is shown in Vposition with the conduit extending parallel the bolt, it will be apparent that the conduit need not extend parallel to the beam but may Vthe usual manner.

extend transversely of the beam as illustrated inv Fig. 4. Any tween the conduit and the beam may be employed as desired.

ln Fig. 5, the device is illustrated in a other angular relation bethe plane of the flange. In some instances,

however, it may be desired to employ the de-` vice to hold a conduit extending transverse to the plane of the flange.l For this purpose, a clamping member 23 may be used. This member takes the form of a hat strap of metal providedwith a hooked end 29, defining a seat inV which the conduit 25 may lie. llhis member is mounted on the end of the bolt 13 and held in place by a nut 2O as before, the conduit lying in the seat and resting with its surface in engagement with the edge of the flange. The conduit thus extends parallel to the bolt 13. This construction may be employed where theconduit extends vertically and is to be attached toa horizontal beam, or it may be employed Vwhere a horizontal conduit is to be attached to a column. For the latter purpose, the clamping member 28 may extend either above or below the bolt as may bev desired. Y

In the construction illustrated in Fig. 8,

a pair of clamp devices are employed for supporting a plurality ofconduits 25. For this purpose, aV device is att-ached to each liange of a beam in the usual manner and a strap member 30 of angle iron or the like is then mounted across-the bolts 13 to provide a support for the row of conduits.

When the device is to be used for supporting a cable (Figs. 9v and 10). there is mounted on the lower end ofthe bolt a U-shaped member 31 having straight .ends 32 drilled for bolts 33. Insulator plates 34 having central depressions providing an opening for the cable-35Y are then secured to the ends of the member 31 in the manner illustrated with the conductor'cable supported between them in A somewhat similar construction is illustrated in Fig. 10 except that the insulator members 34 are formed to support a pairof cables 35. y Y

If it is desired to use the clamp device for supporting an insulator to which a wire may be attached, the base plate 12 may be drilled with a plurality of holes 36 in its periphery and after the device is secured to the flange, an insulator 37 of the common type may be `mounted on a bolt 38 inserted through any f one of the holes in the projecting portion of the plate. A wire 39 may be attached to this insulator in the usual manner.

It will be seen that in the new clamping device, the clamp jaw accommodates it v bears against the upperl surface of theplate under all conditions of use` and holds this plate parallel to'and in engagement with the under surface of the flange. The clamping member for the conduit Amay take various forms and be secured to the remainder of the device 1n various ways, but for simplicity and convenience it is preferable touse a bolt 13 suiiiciently long-so thatthis clamping inember maybe mounted thereon in the mannerdescribed.` The new device can beused vto support conduits lying in a plane parallel to the plane of the beaml flange and extending in any direction in that plane' or it can be used yto supporta conduitl extending transverse- Y ly to the plane of the flange. Similarly, the l device may beused for supporting conductors and for numerous other purposes which will be readily apparent.

We claim -1 l' l. A'clamping device comprising the com-` bination of a base plate, a `jaw .adapted to 4l.l A clampingdevice comprising the come bination of a base plate, a -jaw adapted tov 'i bear at one end against the baseplate and at the other against the surface of `an object to be` gripped between said end 4and they base late saidf'aw in normal ositionextendinfr 7 D around the edge of the object, means Jfor holding the jaw and base plate inl operative rela-` tion, and additional `means engaging said holding means and cooperating therewith for clamping an object to said ,base'plate 5. A clampingdevice comprising the combination of a base plate, a rclamping jaw adapted to bear at one endagainst thebase Vplate and at the other end against the sur face of an object to be gripped between said end and said base plate, said jawin normal position eXtending'around-the edge of the obl ject, a bolt forholding'said jaw and base` plate in operative relation and means engag-V ingand supportedby said bolt for holding an object tov be supported,V 1 In testimony whereof we aiiX our signatures. Y

WALTER si. MAYER..

WILLIAM T, BRADLEY.V

ybear at oneend against the base4 plate and at I the other against the surfaceV of an object to be gripped between said fend and the base plate, said aw in normal position extending around the edge of the object, a bolt passing ythrough the b-ase plate and jaw for holding said parts in operative relation, and clip means mounted on said bolt for clamping an Y element to said base plate.

2. A clamping device comprising thecom` bination of a base member, a jaw adapted to bear at one endV against the base member and at the other against the surfaceV of an vobject Y to be gripped between said end an'd'thebaseY p member, said Jaw in normal position extende porting an object.

ing around the edge of the object, a bolt passing through the base lmember and Vj aw for holding said parts in operative relation, and

3. lA clamping device comprising vthe combination of a base plate, a-*pair of clamping j aws disposed one oneach side of said base plate, one jaw havinga portion adapted tok bear against anobject to be attached to the base plate andV another portion adapted to bear against the base plate, the other jaw having a' portion adapted to l,bear against a support to which the clamp is to be attached and another portion adapted to bear against said base p ate, and means for securing the base plate andsaid jaws together. I

a seat member mounted on said bolt for sup- 

